Ejector mechanism for revolvers.



PATENTED MAR. '27, 1906;

J. D. ROBERTSON.

EJBCTOR MECHANISM FOR REVOLVERS.

' APPLIGATION FILED SEPT. 21. 1905.

. UNITED STATES PATENT orrion JAMES D. ROBERTSON, OF NORWICH,CONNECTICUT, ASSIGNOR TO THE THAMES ARMS COMPANY, OF NORWVICH,CONNECTICUT, A CORPORA- TlON OF CONNECTICUT.

EJECTOR MECHANISM FOR REVOLVERS.

Specification of Letters Patent.

Patented March 27, 1906.

Application filed September 21,1905. Serial No. 279.415.

To all whom it TIZ/LI/Z/ concern.-

Be it known that I, JAMEs D. RoBERTsoN, of the city of Norwich, countyof New London, and State of Connecticut, have invented certain new anduseful Improvements in Ejector Mechanism for Revolvers, which improvements are described in the following specification and areillustrated by the accompanying drawings.

My invention relates to the ejector mechanism of so-calledhinge-revolvers, and in particular to that part of such mechanism whichis known as the disk or cam and is provided with a horn or fingerengaging the extractor-stem and with a disappearing shoulder engagingthe revolver-frame.

It is the object of the invention to impart both a positive motion and asuperior form and mounting to such disappearing shoulder, and thereby torender such extractor mechanism simple in structure and easy of operation. To accomplish this object, I use a closely-pivoted cam, which isprovided with the usual projecting horn and has a peripheral V-notch, incombination with a wedgeshaped shoulderpiece, which is provided with aspring-seated stem and works toward and from said horn transverselyinsaid notch.

Figure 1 of said drawings is a side elevation of a revolver containingejector mechanism which is constructed and arranged in accordance withthe principles of my invention. This view shows the barrel unlocked fromthe breech and in process of being broken down and parts of the barrel,frame, and cylinder removed to expose the interior construction and thearrangement of the several operative parts. Fig. 2 is a perspective viewof the ejector-cam alone. Fig. 3 is a central section of said cam in aplane parallel to its sides, in-

cluding the shoulder-piece and the springseated shoulder-stem. tails.

In the drawings, which as filed are of a full working size, the numerals1, 2, and 3 denote, respectively, the frame, the barrel, and the rotarycartridge-cylinder, while the numerals 4, 5, and 6 denote, respectively,the extractor-spider, the stem of that spider, and the stem-actuatingspring, all of which are of a structure and operation which are commonin revolvers of the class above specified. The extractor-cam isindicated by the numeral 7.

Figs. 4 and 5 are de- This is a plate of uniform thickness and generalcircular form and is provided in the usual 5 5 manner with a horn 8 forengagement with said extractor-stem 5. By means of a central perforation9, which is occupied by the hinge-pin 10, this cam is pivoted so as torockin a fixed position relative to the axis of the hinge by which thebarrel and the frame of the revolver are joined together. Said cam isalso provided with amarginal V-notch 11, which extends through theentire thickness of the cam and has two plane sides or converging faces12 and 13 of unequal length and of unequal inclination to the contiguouscircumference of the cam, as shown in Figs.

1, 2, and 3. Through said face 12 and at right angles thereto acylindrical socket 14 is drilled into the body of the cam midway of itsthickness to a point near the base of said horn 8.

The triangular shoulder-piece or wedge 15, Which is preliminarilymentioned above, has two converging faces 16 and 17, which areapproximately equal in length and form by their conjunction thewedge-point 18. This wedge is mounted in a one-sided or unbalancedposition on a round stem 19, which works in said socket 14 and is seatedtherein upon a spiral spring 20. On account of this eccentricity it isnecessary in assembling to hold the wedge in a turned position whileinserting the stem into socket 14 and then while pressing the wedge downon notch-face 12 to turn the same on the stem-axis through an angle ofninety degrees, more or less, to the angular position shown. In thatposition the wedge is normally pushed forward by the action of spring 20until stopped by contact with notch-face 13. In that advanced positionthis wedge-shaped shoulderpiece is exposed to engagement with the base21 of the barrel 2 and with the holding-shoulder 22 of therevolver-frame.

Such being the construction of my invention, its general mode ofoperation is obvious from that construction and from the familiar modeof operation of other extractor mechroo anism of the same general type.It must be noticed, however, that face 13 of the V-notch 11 serves as astop to prevent the shoulderpiece 15 from coming out of that notch toofar, that said shoulder-piece when cooperatively pinched betweenframe-shoulder 22 and barrel-base 21 is forced toward its seat upon face12 of said notch by squeezin and at the same time is additionallyimpelIed to the same destination by the push of said shoulder 22, whichimpulse is always in a direction approximately parallel to thelongitudinal axis of stem 19. As this additional impulsion varies withthe degree of the parallelism referred to and as that parallelism can beincreased by structurally varying the inclination of the stem-socket 14,it is obvious that the retiring movement of the disappearing shoulder 15may upon the same principle be further facilitated to any desired ornecessary extent.

Such being the construction and operation of my improved ejectormechanism for revolvers, I claim as my invention- 1. In a revolver, anejector-stem, a frame- 20 shoulder, and a cam which is provided with aperipheral V-notch, and with a horn to engage said stem, in combinationwith a wedgeshaped shoulder-piece, which is provided with aspring-seated stem, and is movable in said peripheral notch, and towardsaid horn.

2. In the ejector mechanism of a hinged firearm, a rocking cam, whichhas a stem-engaging horn and a peripheral V-notch,'in combination with awedge-shaped shoulderpiece, which is eccentrically mounted in said notchupon a spring-seated stem, and thereby is normally impelled against oneof the faces of said notch.

In testimony whereof I hereunto set my name in the presence of twoWitnesses.

JAMES D. ROBERTSON.

Witnesses WILLARD EDDY, CHARLES A. LAFFORD.

